public class StringBufferDemo{

    public static void main(String [] args){

        StringBuffer buffer = new StringBuffer();

        buffer.append('S');

        buffer.append("tringBuffer");

        System.out.println(buffer.charAt(1));

        System.out.println(buffer.capacity());

        System.out.println(buffer.indexOf("tring"));

        System.out.println("buffer = " + buffer.toString());

    }

}
